From: Dan Williams <dan.j.williams@intel.com>
To: linux-scsi@vger.kernel.org
Cc: linux-ide@vger.kernel.org
Subject: [PATCH v2 23/28] libsas: async ata-eh
Date: Thu, 22 Dec 2011 19:00:28 -0800 [thread overview]
Message-ID: <20111223030028.21827.84138.stgit@localhost6.localdomain6> (raw)
In-Reply-To: <20111223025350.21827.85779.stgit@localhost6.localdomain6>
Once sas_ata_hard_reset() starts honoring the 'deadline' parameter a
pathological configuration could take 25 seconds per ata device
(serialized) to recover. Run per-port recoveries in parallel.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
drivers/scsi/libsas/sas_ata.c | 17 ++++++++++++++---
1 files changed, 14 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
index 3b7c362..0c67577 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -23,6 +23,7 @@
#include <linux/scatterlist.h>
#include <linux/slab.h>
+#include <linux/async.h>
#include <scsi/sas_ata.h>
#include "sas_internal.h"
@@ -600,22 +601,32 @@ int sas_discover_sata(struct domain_device *dev)
return 0;
}
+static void async_sas_ata_eh(void *data, async_cookie_t cookie)
+{
+ struct domain_device *dev = data;
+ struct ata_port *ap = dev->sata_dev.ap;
+ struct sas_ha_struct *ha = dev->port->ha;
+
+ ata_port_printk(ap, KERN_DEBUG, "sas eh calling libata port error handler");
+ ata_scsi_port_error_handler(ha->core.shost, ap);
+}
+
void sas_ata_strategy_handler(struct Scsi_Host *shost)
{
struct scsi_device *sdev;
struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
+ LIST_HEAD(async);
mutex_lock(&sas_ha->eh_mutex);
shost_for_each_device(sdev, shost) {
struct domain_device *ddev = sdev_to_domain_dev(sdev);
- struct ata_port *ap = ddev->sata_dev.ap;
if (!dev_is_sata(ddev))
continue;
- ata_port_printk(ap, KERN_DEBUG, "sas eh calling libata port error handler");
- ata_scsi_port_error_handler(shost, ap);
+ async_schedule_domain(async_sas_ata_eh, ddev, &async);
}
+ async_synchronize_full_domain(&async);
mutex_unlock(&sas_ha->eh_mutex);
}
next prev parent reply other threads:[~2011-12-23 3:00 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-23 2:58 [PATCH v2 00/28] libsas: eh reworks (ata-eh vs discovery, races, ...) Dan Williams
2011-12-23 2:58 ` [PATCH v2 01/28] libsas: remove unused ata_task_resp fields Dan Williams
2011-12-23 2:58 ` [PATCH v2 02/28] libsas: kill sas_slave_destroy Dan Williams
2011-12-23 2:58 ` [PATCH v2 03/28] libsas: fix domain_device leak Dan Williams
2011-12-23 2:58 ` [PATCH v2 04/28] libsas: fix leak of dev->sata_dev.identify_[packet_]device Dan Williams
2011-12-23 2:58 ` [PATCH v2 05/28] libsas: replace event locks with atomic bitops Dan Williams
2011-12-23 2:59 ` [PATCH v2 06/28] libsas: convert ha->state to flags Dan Williams
2011-12-23 2:59 ` [PATCH v2 07/28] libsas: introduce sas_drain_work() Dan Williams
2011-12-23 2:59 ` [PATCH v2 08/28] libsas: remove ata_port.lock management duties from lldds Dan Williams
2011-12-23 2:59 ` [PATCH v2 09/28] libsas: prevent domain rediscovery competing with ata error handling Dan Williams
2011-12-23 2:59 ` [PATCH v2 10/28] libsas: use ->set_dmamode to notify lldds of NCQ parameters Dan Williams
2011-12-23 2:59 ` [PATCH v2 11/28] libsas: kill invocation of scsi_eh_finish_cmd from sas_ata_task_done Dan Williams
2011-12-23 2:59 ` [PATCH v2 12/28] libsas: close error handling vs sas_ata_task_done() race Dan Williams
2011-12-23 2:59 ` [PATCH v2 13/28] libsas: prevent double completion of scmds from eh Dan Williams
2011-12-23 2:59 ` [PATCH v2 14/28] libsas: fix timeout vs completion race Dan Williams
2011-12-23 2:59 ` [PATCH v2 15/28] libsas: let libata handle command timeouts Dan Williams
2011-12-23 2:59 ` [PATCH v2 16/28] libsas: defer SAS_TASK_NEED_DEV_RESET commands to libata Dan Williams
2011-12-23 2:59 ` [PATCH v2 17/28] libsas: use libata-eh-reset for sata rediscovery fis transmit failures Dan Williams
2011-12-23 3:00 ` [PATCH v2 18/28] libsas: perform sas-transport resets in shost->workq context Dan Williams
2011-12-23 3:00 ` [PATCH v2 19/28] libsas: execute transport link resets with libata-eh via host workqueue Dan Williams
2011-12-23 3:00 ` [PATCH v2 20/28] libsas: sas_phy_enable via transport_sas_phy_reset Dan Williams
2011-12-23 3:00 ` [PATCH v2 21/28] libsas: Remove redundant phy state notification calls Dan Williams
2011-12-23 3:00 ` [PATCH v2 22/28] libsas: add mutex for SMP task execution Dan Williams
2011-12-23 3:00 ` Dan Williams [this message]
2011-12-23 3:00 ` [PATCH v2 24/28] libsas: poll for ata device readiness after reset Dan Williams
2011-12-29 6:18 ` Jack Wang
2012-02-19 22:06 ` James Bottomley
2012-02-20 1:08 ` Jack Wang
2011-12-23 3:00 ` [PATCH v2 25/28] libsas: don't mark expanders as gone when a child device is removed Dan Williams
2011-12-23 3:00 ` [PATCH v2 26/28] libsas: check for 'gone' expanders in smp_execute_task() Dan Williams
2012-01-09 19:04 ` Dan Williams
2011-12-23 3:00 ` [PATCH v2 27/28] libsas: fix sas_find_local_phy(), take phy references Dan Williams
2011-12-27 9:21 ` Jack Wang
2011-12-28 18:45 ` Dan Williams
2011-12-29 6:18 ` Jack Wang
2011-12-23 3:00 ` [PATCH v2 28/28] libsas: don't recover 'gone' devices in sas_ata_hard_reset() Dan Williams
2011-12-27 9:23 ` Jack Wang
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